INFORMATION MANAGEMENT METHOD

PROBLEM TO BE SOLVED: To provide an information management method that makes data such as an information encryption key difficult to be taken out so as to protect the information to be kept secret. SOLUTION: This invention provides an information management method, in a system where secure management of information needing security is a requirement and the information is encrypted by using an encryption key, that inputs the encryption key and encryption processing to one information safe so as to execute processing for a job needing an authentication encryption key without the need for extracting the key information to the outside of the information safe even when the processing to need the authentication encryption key is implemented as a job and even the center or the like with the information safe installed therein cannot extract the key information in the information safe without permission.